1. 2nd Pulmonary Medicine Department, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, Athens, Greece
2. Nuclear Medicine Division, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
3. Department of Biomedical Engineering, University of West Attika, Athens, Greece
4. 2nd Department of Radiology, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, Athens, Greece
5. Aiginitio Hospital, Medical School, National and Kapodistrian University of Athens, Greece
6. 2nd Department of Radiology, Division of Nuclear Medicine, General University Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens, Athens, Greece